考虑参数不确定性的框剪结构敏感性分析  

Sensitivity analysis of frame-shear structure considering parameter uncertainty

作　　者：杨鑫 王惠民[1] 姚激[1] 黄坤[1] 龚云峰 YANG Xin;WANG Huimin;YAO Ji;HUANG Kun;GONG Yunfeng(Faculty of Civil Engineering and Architecture,Kunming University of Science and Technology ,Kunming 650500)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500

出　　处：《工业安全与环保》2022年第4期1-4,共4页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(11562009)。

摘　　要：建筑结构的地震需求受诸多不确定性参数的影响,为研究这些参数对地震响应的影响,以13层钢筋混凝土框架-剪力墙结构为例,基于结构非线性时程分析的结果,得到了选择不确定性参数的Tornado图形敏感程度排序,排序结果表明:对于无控和有控结构,地震动强度和地震动特征对地震需求的影响均较显著;增设阻尼器后,阻尼系数和阻尼指数也会产生较大影响,但敏感程度次于地震动的随机性,针对不同地震需求,结构质量、阻尼比、混凝土弹模影响程度近似,但其敏感性排序并不完全相同。The seismic demand of a building structure is affected by many uncertain parameters.In order to study the influence of these parameters on the seismic response,a 13-story reinforced concrete frame-shear wall structure is taken as an example.Based on the results of the nonlinear time history analysis of the structure,the results are obtained.The selected uncertainty parameters are sorted by the sensitivity of Tornado graphs.The sorting results show that:for uncontrolled and controlled structures,ground motion intensity and ground motion characteristics have significant effects on the seismic demand;with the addition of dampers,the damping coefficient and damping index will also have a greater impact,but the sensitivity is inferior to the randomness of ground motion.For different seismic requirements,the impact of structural quality,damping ratio,and concrete elastic modulus is similar,but their sensitivity rankings are not completely the same.

关 键 词：框剪结构 非线性时程分析 不确定性参数 敏感排序 

分 类 号：TU3[建筑科学—结构工程]